Sierra Research Laboratories, SRL, was founded in early 1994 by Dr. Bill Donahue in Modesto, California. Our primary scope is to conduct research in the fields of Urban and Veterinary Entomology. Our focus has been compound screening, formulation evaluations, insect control product development and comparative efficacy trials. We have also conducted in vitro and in vivo parasitology evaluations with nematode models and have branched out to conduct phytotoxicity tests and herbicide evaluations. SRL has conducted a wide range of laboratory and field efficacy trials including product registration studies in accordance with U.S. EPA Good Laboratory Practice (GLP) guidelines. We welcome the opportunity to work with you in designing efficacy studies to meet your needs.